資料來源 : pyDict

鈮鐵礦

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Niobite \Ni"o*bite\, n. (Min.)
   Same as {Columbite}.

資料來源 : WordNet®

niobite
     n : a black mineral that is an ore of niobium and tantalum [syn:
          {columbite}]